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Published in: Neurological Sciences 4/2022

01-04-2022 | Spastic Paraplegia | Brief Communication

A case of spastic paraplegia type 11 mimicking a GM2-gangliosidosis

Authors: Diego Lopergolo, Gianna Berti, Francesca Mari, Enrico Bertini, Alessandra Rufa, Carla Battisti, Francesco Sicurelli, Alessandra Renieri, Antonio Federico, Konrad Sandhoff, Alessandro Malandrini

Published in: Neurological Sciences | Issue 4/2022

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Abstract

Introduction

Spastic paraplegia type 11 (SPG11) is the most frequent autosomal recessive HSP. Studies on SPG11 patients’ fibroblasts, post-mortem brains, and mouse models revealed endolysosomal system dysfunction and lipid accumulation, especially gangliosides. We report a patient with early clinical findings mimicking a GM2-gangliosidosis.

Methods

A clinical, biochemical, and metabolic characterization was performed. Electron microscopy analysis was completed on rectal mucosa and skin biopsy specimens. A NGS panel of genes associated to neuronal ceroid lipofuscinosis and HSP was analyzed.

Results

The patient presented with worsening walking difficulty and psychomotor slowdown since childhood; to exclude a neurometabolic storage disease, skin and rectal biopsies were performed: enteric neurons showed lipofuscin-like intracellular inclusions, thus suggesting a possible GM2-gangliosidosis. However, further analysis did not allow to confirm such hypothesis. In adulthood we detected flaccid paraplegia, nystagmus, axonal motor neuropathy, carpus callosum atrophy, and colon atony. Surprisingly, the NGS panel detected two already reported SPG11 mutations in compound heterozygosity.

Conclusions

We describe for the first time pathological hallmarks of SPG11 in enteric neuron from a rectal mucosa biopsy. The report illustrates the possible overlap between SPG11 and GM2-gangliosidosis, especially in the first disease phases and helps to improve our knowledge about SPG11 physiopathology.
Literature
Metadata
Title
A case of spastic paraplegia type 11 mimicking a GM2-gangliosidosis
Authors
Diego Lopergolo
Gianna Berti
Francesca Mari
Enrico Bertini
Alessandra Rufa
Carla Battisti
Francesco Sicurelli
Alessandra Renieri
Antonio Federico
Konrad Sandhoff
Alessandro Malandrini
Publication date
01-04-2022
Publisher
Springer International Publishing
Published in
Neurological Sciences / Issue 4/2022
Print ISSN: 1590-1874
Electronic ISSN: 1590-3478
DOI
https://doi.org/10.1007/s10072-021-05841-8

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